Book Image

Accelerating Server-Side Development with Fastify

By : Manuel Spigolon, Maksim Sinik, Matteo Collina
5 (1)
Book Image

Accelerating Server-Side Development with Fastify

5 (1)
By: Manuel Spigolon, Maksim Sinik, Matteo Collina

Overview of this book

This book is a complete guide to server-side app development in Fastify, written by the core contributors of this highly performant plugin-based web framework. Throughout the book, you’ll discover how it fosters code reuse, thereby improving your time to market. Starting with an introduction to Fastify’s fundamental concepts, this guide will lead you through the development of a real-world project while providing in-depth explanations of advanced topics to prepare you to build highly maintainable and scalable backend applications. The book offers comprehensive guidance on how to design, develop, and deploy RESTful applications, including detailed instructions for building reusable components that can be leveraged across multiple projects. The book presents guidelines for creating efficient, reliable, and easy-to-maintain real-world applications. It also offers practical advice on best practices, design patterns, and how to avoid common pitfalls encountered by developers while building backend applications. By following these guidelines and recommendations, you’ll be able to confidently design, implement, deploy, and maintain an application written in Fastify, and develop plugins and APIs to contribute to the Fastify and open source communities.
Table of Contents (21 chapters)
Part 1:Fastify Basics
Part 2:Build a Real-World Project
Part 3:Advanced Topics

Managing uploads and downloads

We need to add two more functionalities to our application, and we will do it by developing a dedicated Fastify plugin. The first will allow our users to upload CSV files to create to-do tasks in bulk. We will rely on two external dependencies to do it:

  • @fastify/multipart for file uploads
  • csv-parse for CSV parsing

The second plugin will expose an endpoint to download items as a CSV file. Again, we need the external csv-stringify library to serialize objects and create the document.

While we will split the code into two snippets in the book, the complete code can be found in ./routes/todos/files/routes.js. Let’s explore the following snippet, which contains the file upload and items bulk creation logic:

const fastifyMultipart = require('@fastify/multipart')
const { parse: csvParse } = require('csv-parse')
// ... omitted for brevity
  await fastify.register(fastifyMultipart, { // [1]